ISSN:0935-9648    

DOI:10.1002/adma.19930050301

出版商:WILEY‐VCH Verlag GmbH    

年代:1993

数据来源: WILEY

ISSN:0935-9648    

DOI:10.1002/adma.19930050302

出版商:WILEY‐VCH Verlag GmbH    

年代:1993

数据来源: WILEY

摘要:

AbstractRecent studies on ferroelectric liquid crystals (FLCs) with an alkanoyl group are reviewed in this article. The FLCs exhibit large spontaneous polarization, especially when another chiral group is introduced at the opposite side of the core. The maximum value reaches 1130 nC/cm2, which is almost the same as the total transverse dipole in the molecule. Fastswitching FLC mixtures can be obtained by using these compounds. The synthesis and properties of FLC polymers having the same mesogen and chiral group are also described, and some applications of the FLC mixtures in devices for optical communication reported.

ISSN:0935-9648    

DOI:10.1002/adma.19930050303

出版商:WILEY‐VCH Verlag GmbH    

年代:1993

数据来源: WILEY

摘要:

AbstractThis review discusses nonlinear optical (NLO) polymeric materials. As an example of a second‐order NLO material, a novel copolymer with a diazo dye attached is investigated. The second‐order NLO coefficient χ(2)of the copolymer reaches 1.0 × 10−6esu, which is 7 times larger than that of LiNbO3. A third‐order NLO coefficient χ(3)larger than 10−10esu is obtained for polymers where NLO dyes are introduced into the polymer backbone. The optical transmission loss of these polymers is revealed to be around 2 dB/cm. As these polymers can be formed into channel waveguides using the photo‐bleaching technique, they show promise for use in NLO devices because of their processability, transparency and large optica

ISSN:0935-9648    

DOI:10.1002/adma.19930050304

出版商:WILEY‐VCH Verlag GmbH    

年代:1993

数据来源: WILEY

摘要:

AbstractThis review describes recent advances in thin film studies of high‐Tcsuperconducting cuprates. Emphasis is placed on epitaxial thin film growth technologies for LnBa2Cu3Ox(Ln = Y, Eu) cuprates, and on microwave device applications. An exciting area of this research involves epitaxial multilayer structures, such as a superconductor/insulator/superconductor (SIS) combination, and so preliminary results on SIS fabrication are also describe

ISSN:0935-9648    

DOI:10.1002/adma.19930050305

出版商:WILEY‐VCH Verlag GmbH    

年代:1993

数据来源: WILEY

ISSN:0935-9648    

DOI:10.1002/adma.19930050306

出版商:WILEY‐VCH Verlag GmbH    

年代:1993

数据来源: WILEY

ISSN:0935-9648    

DOI:10.1002/adma.19930050307

出版商:WILEY‐VCH Verlag GmbH    

年代:1993

数据来源: WILEY

摘要:

AbstractComputer‐aided materials design for semiconductors is reviewed. Reliable predictions are possible for a wide range of problems, such as the behavior of various heterovalent atomic species in III‐V semiconductors, including C (conduction type), Si (DX‐center), Ge (GaAs/Ge superlattices), S, Se and Te (passivation of GaAs surfaces), by using such computer‐aided calculation techniques as pseudopotential

ISSN:0935-9648    

DOI:10.1002/adma.19930050308

出版商:WILEY‐VCH Verlag GmbH    

年代:1993

数据来源: WILEY

ISSN:0935-9648    

DOI:10.1002/adma.19930050309

出版商:WILEY‐VCH Verlag GmbH    

年代:1993

数据来源: WILEY

ISSN:0935-9648    

DOI:10.1002/adma.19930050310

出版商:WILEY‐VCH Verlag GmbH    

年代:1993

数据来源: WILEY